<p>Be sure to add <code class="highlighter-rouge">role="dialog"</code> and <code class="highlighter-rouge">aria-labelledby="..."</code>, referencing the modal title, to <code class="highlighter-rouge">.modal</code>, and <code class="highlighter-rouge">role="document"</code> to the <code class="highlighter-rouge">.modal-dialog</code> itself. Additionally, you may give a description of your modal dialog with <code class="highlighter-rouge">aria-describedby</code> on <code class="highlighter-rouge">.modal</code>.</p>
